Security system housing



FIG. 1 is a top plan view of the security system housing showing my new design;

FIG. 2 is bottom plan view thereof;

FIG. 3 is the right side plan view thereof;

FIG. 4 is the left side plan view thereof;

FIG. 5 is the front plan view thereof;

FIG. 6 is the back plan view thereof; and,

FIG. 7 is the elevational view thereof. 

The ornamental design of security system housing, as shown and described. 